Typewriting machine



Jan. 6, 1931. J. A. B. SMITH ,7 ,9

TYPEWRITING MACHINE Filed June 15. 1928 2 Sheets-Sheet l H Y 47 4 M if fivvenfor:

Affaney.

Jan. 6, 1931. J. A. B. SMITH TYPEWRITING MACHINE 2 Sheets-Sheet 2 Filed June 13, 1928 //7 venfor Patented Jan. 6, 1931 i UNITED A E JESSE AMB. SMITH, or -sar ivrironn, oonnnorroun AssIG'NoR'mo imnnnwoonnnmor'r rIs'HER COMPANY, on new Yem n. y aoonrone rrou on DELAWARE ITYPEWBITING o imE Application filed June 13,

This invention relates to webunanifolding,

carbon-stripping typcv 'iting machines, in each of which there is often employedan additional web or sheet for a condensed record, upon which are closely manifoldedthe entries from a long succession of fan-fold forms; A fan-fold work-web may be considerably narrowerthan the .condens r record-web used with it, and the side margins of the latter 19 may be leftv exposed, to he held during manipulation of the'overlying work-web. I r

A manuallyoperable device is provided in "my co-pending application, Serial N0, 273,- 452, filed April 28, 1928, for clamping a rec- 15 ord-web at both the introductory and delivery side of the platen, to hold the record-web taut against the platen when the latter isloeing displaced upwardly, therebypreventing therecordweb from falling away from the 20 platen onto the underlying straightened work-web and becoming kinked or fouled. The record-web clamp, disclosed in said eopending application, was operated by a lever, which was disposed near the usual lever wl'iieh locks the platen down in typing position.

it a feature of the present invention to proVideauto-matie means for clamping :1 record web'or sheet at both sides of the platen,

the same to be operated upon a releasing to typing position I v 40 In practising the present invention as.

applied roan Underwood continuous billing typewriting machine, a'clamping dev ce, including a paper-table and a pair of clamps, is mounted on the platen-displacing frame, partly at the introductory side of the platen,

and partly at its delivery side, All of the clamps are normally ineffective, and are operatively connected to a platen-displacingf-rame-locking-lever, so as, to be made effective by an unlocking vmmement of said lever,

192 8. serial in. 284,976.

whiclrilstlsb effective to raise the platen slightly off the lower feed-rolls. A device is'mounted on the platen -displacing frame whichlocks the clampsin etiectiveposition upon swinging the frame upwardly tocarhon-stripping position. The locking device is automatically released upon loweringthe platen to typing position, and the clamps are concomitantly swung upward to ineffective positions. I j I It is a feature of the presentinvention to. arrange the operative connection between the record-web clamps and the'platen-frame locking-lever, wherebyt'he record-web is not released by the; lower feed-roll. until it isgripped by the record-web clamps. Another feature. resides in the provision of .means,

whereupon, when loweringthe platen from its raised carbon-stripping position, the record-web clamps are maintainedin locked engagementwith-their respective tables until the platen is locked in engagen'ient with the lower feed-rolls. From the two above noted features, the advantage results that the reeord web is always clamped against accidental displacement on the platen.

further featureresides in the provision of a simple device for locking the record-web clamps in engagementwith their respective taljilos, which device is initially moved adjacent its effective locking position, by operation oi 'the )latcn-displacm -framedockin lever, and is subsequently locked by forward movement of the platen-displacing frame. This advantageous arrangement of the lockingdevice permits av platen-raising operation of the locking-lever without causing the record-web clamps to become locked, and necessitating subsequent unlocking.

Other features and advantages will hereinafter appear.

In the. accompanying drawings,

Figure 1 is a fragmentary cross-sectional view, front'to rear,;through an Underwood continuous billing typewriting machine, having my invention appliedthereto.

Figure! is-a diagrammatic view ilustrate ing the co'z-ietion certain parts with a platend-displacing frame-loeking-lever which is shown partly operated.

crl

' presentinvention. v

Figure 5 1s a fragmentary detail 'Vl8W 1llus-' trating how the feed-roll-release mechanism Figure 3 is a view similar to Figure 1, in which the loclnngdever is shown moved to its r'earmost position.

Figure 4: is a disassembled perspective detail view of a locking pin and finger of the may be mounted mg rrame. p 7 V Figure is a fragmentary front perspective view of the structure shown in Figure 1.

Figure 7 is diagrammatic view illustratto clear the platen-displac ing how the record-web clamps remain locked" in effective positions when the platen is in its raised carbon-stripping position.

Figure 8 is a diagrammatic'view illustrating how the clamp-locking device of the invention is automatically released upon lowering the platen fromits raised carbonstripping position. c

,Theipresent invention is illustrated in connection with an Underwood continuous-billing typewriting- 'machine, in. which types 10. strike against a-platen 11 on a platen-shaft 12 journaled-in'a right-hand side plate 13 and a left-hand side plate 14 of a platen-displacing frame 15 which is pivotally mountedon Instrumentahties for line-spac.

carriage 16. mg the platen include a ratchet-wheel 17 operatively connected to a gear-wheel 18 which, actingthrough a pinion .19 on a stub-axle 20 fast on the carriage, rotates a gear-wheel 21 on theplaten-shaft 12. Lower feed rolls 22 28'and guide the web laterally as it is conduct ed to the platen. I T

r The parts described hereinbefore may beof usual construction employed in an Underwood standard continuous-billing typewrit ing machine.

A typewriting machine embodying the present invention may be advantageously used for manifolding aline of data on each 7 of a series of sets of short forms 31 previously printed on the work-web 23 and making a condensed record-of such data on a wider underlying record web or sheet 32. lhe recordweb is laterally positioned on the platen by means hereinafter described, so that both of its side edge portions extend out beyond the side edges of the web 23. For making a neat condensed record, it is desirable to hold the record-web tautaround the platen while the 'record=web may be conducted.

7 latter is in its raised position, lest it fall onto the underlying work-web and be kinked or fouled thereby. d

To this end, means are provided for holding the record-web taut on the platen while a typed set of forms is manipulated for carhon-stripping purposes. One embodin ent of the record-web-holding means includes an auxiliary rear paper-table 35 over which the The table 35 is disposed above the u'sual rear paper-table 24 over which the work-web is conducted. The table 35 includes a plate body 36, each end of which may be fastened as by rivetingto an inreaching flange 37 which is integrally joined to a downward extension 38 of an inreaching bracket 39 which may be int it; oined to the adjacent side plate of the l Jilldisplacing frame 15.

' To the inner face of each extension 88 may be riveted an upwardly and forwardly 1nclined standard 40 whose upper end is curled for engaging with a snug fit around a'gagebar-supporting roda1. As illnstrated in Figure 6, the inner face of the right-hand tension 38 may serve as a side edge guide for the'record-sheet 32. To provide gaging devices at the delivery side of thepl aten for the work-web 23, an angle-bar l3 extends between the rods 41 and may be fastened to theirupper ends as by riveting, so that a flangemember 44 of the angle-plate is inclined downwardly'toward the platen substantially tangent thereto. The upper edge of the member 44 may serve as a tearing-off gage for the forms 31, a successionof which are d'vided by perforated lines indicated at 45. -To provide for adjusting the upper edge of the flange 44; toward and away from the printing line, each rod 41 may be adj ustably clai'i'iped to the standard 40 by thumb-screws as. I

Two angle platesi, each having a relatively long base-member 4:8 with a lengthwise slot 49thereir and a short upwardly-reaching arm 50, are mounted for lateral adjustment upon the flange-member 44 by means of screws 51- which pass through the slots and are threaded in tapped holes 52 in the member 44. The arms are spaced apart slightly more thanthe width of the work-web 23, the typedportion of which may pass between the arms to be laterally guided thereby.

To co-operate with the auxiliary-table 35 for holding the record-web, each of two fiexibleclamping arms is mounted on a collar 61, which is adjustably fastened by set screws 62 on a rock-shaft 63 extending between the side plates 13 and 1 1. The shaft ()3 is journaled at its right end on an inreaching pivot-screw 64: in the side plate 13. lvlounting the shaft 63 in the manner described allows other parts to be assembled on it and the whole to be conveniently assembled as a hint on the platen-displacing frame. From its collar 61, each flexible arm 60 extends v downwardly and. f forwardly adjacent the table 35. and its lower end portionis encased in a paper gripping rubber shoe against the table 35 which bears squarely adjacent its lower edge.-

' Means for clamping the exposed side edge portionsof the record-web82 at the delivery side of the. platent includes apaper-table 66' mounted on a cross-bar 67 between-the f sides of the platen-displacing frame 15.1, The lower portion of-the table66 is disposed substantially tangent to the platen, and an upper rear P01131011. 68 1S bent upwardly to deflect the record-sheetabove the rock-shaft To co-operate with the table 66, two clamp-- :mgarms 70 are mounted loosely on the reelsshaft 63, one arm being positioned outwardly a short distance from the ad Each arm 70 may have a short upreaching 1 portion 71 with an aperturethrough its lower end to receive said shaft and a member 72 integrally joined to the top of the upreaching portion 71 and extendingtherefrom forwardly near'the loweredge of the table 66. i

. The forwardendportion of each member 7'2 end of each springis fastened to the-screw v act-ionof the spring. 82, tending to rotate turns downward toward the table 66 and then terminates in an inreachingtab 73 having a paper-gr pping rubber shoe 74;

An operative connection between the clamping arm 70 and the rock-shaft 63 includes a spring 75 coiled around the shaft between two EtClJttCQIll) clamping arms 60 and70. ()ne 62 in the adjacent collar Gland the other end of the spring extends upwardly along the upreaching arm portion 71 and terminates in a hook-member 76wh1ch engages behind the uprea-ching portion. Each spring 75 is arranged with initial tension which normally urges the associated arm 70 toward the table To enable clockwise rotation of the rockshaft 63 to raise. the rubber-covered tabs 73 from the table 66,. an upreaching arm 77 isrigidly fastened on the shaft 63 outwardly from each clamping arm 70 and closely adjacent thereto by means of a hub 78 which may be secured to the rock-shaft 63 in any suitable way. The upper end of each arm 77 has an inreaching extension 79 which engages against the forward edge of the upreaching tongue 71 on the clamping arm 70. 1

The shaft 63 is normally urged clockwise against a stop hereinafter described byin strumentahties including a downwardly-extendi 11g arm 81 fastened securely on the shaft adjacent its left end and a contractile spring,

82 which has one end fastened to a pin S3 in the arm 81 and the other end fastened-t0. a

pin 84 in the left-hand side plate 13. The

the army 70 clockwise, is stronger thanthe action of the spr1ngs75" and in consequence thereof the. armsarenormally disposed in w ineffective positions above the paper-table;

jacent arm 60.

The arms 60 are mounted on the collars 61 so as to be disposed abovethe paper-table when the shaft 63 is held in its extreme clockwise position bythe spring 82.

In a web-manifolding typewriting machine ofthe type disclosed 'inthe patent to Wernery dtsmitlnllo. 1,132,055, dated March 16, 191", 1t 1s usual to provide instrumentaliti'es for locking the upwardly displaceable platenframe down in typing position; It is necessary to release these instrumentalities preparatory to raisingf'the platen for stripping the carbons.

It is a feature of the present invention to prov de platen-frame-locking instrumentalb ties which co -operate with mechanisnnto be described hereinafter, which manipulates the record-web-clamping arms. To this end. a laterally-disposed inreaching locking pin device generally designated as 85 is fastenediii the platen-frame side plate 14, and asimilar lockingpin'device 86 is fastened in the side plate 13 The pin devices 85 and 86 are posi tioned short distanceabove and a short distance forward from a usual crossrod 87 which extends between the sides of the car riage 16 and forms a stop for a usual depending stop-portion 88 of the side plates 13 and 14. 1

The pin-device 85 (see Figure 1) includes a boss-portion 90 disposed against the side plate '14, a reduced stud-member 91 having a threaded extension 92 and a collar 93 which "fits loosely over the stud-portion and is carriage16. The lower end of the lever is enlarged and may have an irregular form as illustrated; in Figure 7 which includes a stop-lug 101, aloclring slot 102, and a cam shoulder 103. w i

The slot 102 has awidth at all points for engagin' abont the collar '93 with a running fit. The slot also serves as a cam, andgfor purpose to presently appear, the rear end portion of thefslot has a circumferential dwell 104 centeredaboutthe axis of the rod 0!. A forward portion of the slot is formed with a lower cam edge 105, eifect veto raise the pin. 85, upon movement of the lever 100 rearwardly. An integral tongue-member 106 on the lower end of the lever 100. extends forwardly below the mouthiof the slot 102 and has its upper edge shaped for forming a continuation of the cam edge 105. The extreme forward end ofthe tongue 106 has an its upwardly-turned hook portion 107 V which is l effective to against the pin 85 and arrest the lever 100 when the'lat er is moved to its rearmost position:

The lever 100'is normally urged forwardly by a spring 108; which is coiled aboutfthe rod and has its rear end hooked over the top edge of the paper-table 24k and the other end oove the rod 87. A cam edge 112 ed on the forward slde of a downwardly and forwardly inc med extens1on113 of the arm 81, and is normally urged by the spring 82 against the sleeve-bearing pin 11.0 which thus serves to limit the upward swing of'the clamping arms 60 andaway from their respective tables. 7

7 According to one use of a continuous billin typewriting machine, embodying the oresent invention, after t in a usual line of data on a form, the clamping arms 60 and 70 being normally released, both the workweb 23* and the record-web 32 are linespaced ahead by the usual line-spacing instrumentalities enough'to give the desired continued record spacing on the web 32.

The lever isthen pushed rearwardly' by a finger of the left hand of the operative which engages a fingerpiece 114- on the end of the lever. The pin 110, acting on the cam edge 1120f the arm 81, is quickly effective to cause the clamping arms 60 and 70 to he moved against their respective tables for gripping the record-web 32-, and the dwell 10 1 moves rearwardly from the pin'Sf. As illustrated in Figure 2, the pin 110 will more to the rear enough to cause the arms (30 and 70 to grip the record-web 32 1S1} their respective tables before the cam edge of the slot 102, acting on the pin 85, will cause the platen 11 to be raised off the feedrolls This advantageous arrangement pro: vides for the record-shcet to be clamped against misplacement in the machineduring the raising of the platen 11.

Upon'inovement of the lever 100 to it"s rearmost positionKFigure 3'), the platen will I have been I raised clear ofthe feed-rolls. Should it be desired to type two or more forms before severing them from the workweb 23, the latter can be pulled ahead to bring the leading edge of the typed form to the tearing-off gage 1 1, Which is positioned to have the first writing line of the next succeeding form brought'to the printing line. V

After the finger-piece 114: is released, the springs 82 and 108 will co-operate in restoring the platen 11 to typing position. Movement of the lever 100 over the latter part of its travel is not prevented by the clamps 60 and 70 having already engaged their respective tables, since the spring 75 will yield and allow the shaft 63 to be further rotated by finalmoverrnent of the lever 100. "Also bepin 110 swings the arm 81 counterclockwise about the pivot-shaft 63 suificiently to bring a square locking pin 115, securely fastened on the right side of the arm 81, to a position adjacent the end of a finger 116 of the trigger 95. The end of the finger has an offset or a square notch 117 arranged for havin the pin seated therein when the platen-displacingframe 15, which carries the arm 81, is swung upward and the lower end of the arm rides over and past the sleeved pin 110, which willpermit the spring 82 to pull the arm 81 counterclockwise. To, keep the notched end of the finger 116 in position for engaging the pin 115 while both the pin and the finger are moving clockwise, the lower end of a depending linger 118 of the trigger 95 is arranged to ride over the rod 87 and maintain the notched finger 116 in position to engage the pin 115 as soon as it is swung counterrlocinvise by the spring 82 about the shaft 63. l.hereafter, the pull ofthe spring 82 holds the pin locked in engagement with the notched finger while the platen-i'r'rame is being displaced upwardly to Figure 7 position'for straightening the web 23. lVhile the platen-frame is being swung forward and upward, theoperatives linger will be removed from the'finger-piece 11 1 on the upper end of the lever 100, and the latter will he swung forward to Figure 7 position by the spring 108. i

It will be noted that in. the Fi ure 7 position the record-web, being clamped at both sides of the platen. is held securelyagainst falling away from the. platen on the underlying Work-web and being kinked or otherwise fouled as the work-web is manipulated. The carbons may be stripped in the usual way and the platen lowered. I I

It is a feature of the present invention that the arms which clamp the record-sheet on the tables 35 and 66 are automatically released by the loweringof the platen to typing position. To this end, the shoulder 103 on the lever 100 is provided with a forward cam edge 120 which is disposed for engagement by thepin 8 5 when the'latter' is lowered from the raised carbon-stripping position of the platen. r The 1 pin, as it is swung down, camsthe shoulder 103 and the lever100- clockwise as indicated in Figure 8. W hile the pin 85 descends past the lower end of the camedge-120 in front of the open end of the slot 102, the descending trigger linger 118V strikesthe cross-rod 87 and swings the notchedlinger 116 up out of'engagementwith the saprare locking pin 115 and releases the arm 81 which controls the clamping arms and '70. The lever 100 is likewisereleased "when the'pin clears the cam shoulder 103. i

It will be noted that when the cam slot 102 V in the lever has been swung counterclocks wise to the 'Figuref2 position by the'spring 108, the slotsco-action with the pin 85 has moved the platen down into engagement with the feed-rolls 22. Further movement of the lever 1'00 counterclockwisehas no further effeet on the platen since the pin 85,is now in the dwell 104,but the further counterclocln, =1 wise movement permits thearm 81, which is 1 caused to follow the lever closely by the spring the next form.

hereinbe'liore.

82, to efiectvthe raising of the clamping arms 60 andi'O from their respective tables. o Anew cycle-of operations A locking member 121,,which co-operates with the locking lever 100,is':mounted on the rod 87 adjacent'the side plate13 and has a cam shoulder 122 for engagement by the pin 86. lhe shoulder has axlower cam edge 123 which is similar to the upper edge of the slot 102, and engages over the pin 86.

It will be seen that the record-web 2, afterbeing inserted inposition to beclamped by the clamping arms 70, will always be gripped, either against the platen 11 by the feed-rolls 22 or against the tables 85 and 66 by the clamping ar1ns-60 and'70 respectively. To

provide'ior'truing the record-web in case it is accidentally displaced while-being insertedor afterwards, the feed-rolls 22 may be connected to a usual feed-roll-release lever 125 by usual instrumentalities including a cam shaft 126, a crank arm 127 and a link 128 which may be disposed between a usual gear 129 and a right hand side plate 130 of the carriage 16'(Figure 5).

t can be readily seen by those skilled in the art than a continuous billing typewriting machine embodying the presentinvention may now begin by typing platen displacing frame, a platen in said frame around which may be fed from-the rear a-multiple-ply, carbon-interleaved workvweb and a wider underl ing record-web having both side edges exposed, lower iced rolls,

a lerer for locking said platen downagainst said feed rolls, a device on said frame for clamping said record-web at the introductory side of said platen, a device onsaid frame for clamping said record-web at the delivery side o; said alaternsaid clamping devices being disposed V in ineffective positions against spring pressure while typin is performed, a connection between said locking lever and said clamping devices for making the latter eiiective upon an initial'unlocking movement :of said lever, said record-Web remaining engaged bet son said platen and said feed-rolls during said initial movement of said lever,

means for raising the platen slightly off said feed-rolls upon a complete, unlocking movet rid lever, whereby said work-Web be advanced relativetosaid record-web, arranged for locking said clainpin devices in their clieetive positions, upon raising said platen-frame to carbonstripping position subsequent to the complete unlocking movement of said lever, said clamping. devices remaining etl'ective upon displacement or" said irame and holding said record-web against falling away from said displaced platen onto said wo1-k web and beingklnlred or fouled, and means Gl'lBCtlVB for releasing said locking instrumentalities upon lowering said displaced platen, said last-named means DECOIHHIY eiiective only after said platen has engaged said lowerfeedrolls,the operation of said record-web clamps being thereby controlled relative to-the en- I ,gagement ot'saul platen and said feed-rolls,

so that the recordaveb is always gripped by said clamps or said feed-rolls.

2. In a Web-maniiolding, carbon-stripping typewriting machine, the combination of a platen displacing frame, a platen in said frame around which may be :fed from the rear a multi lel carbon-interleaved workweb and a wider underlying record-web hav-. mg bothside edges exposed, lower feed-rolls,

a locking lever for locking said platen down in typing position, said lever being also effective to raise saidplaten slightly ofl said feed-rolls when moved to its completely released position, a normally mefi'ective clamping device on said frame for clamping said record-web at; the introductory side of said platen-trainee normally inelfective clampingdevice on said frame at the'delivery side of said platen for clamping the side edges of said record-web" clear of said Work-web, a'

connection between said lever and said clamping devices for making the latter effective upon an initial platen-unlocking movement of said lever, whereby said. devices are made efiective before said platen is raised 0 3 E' .said feed-rolls, releasable instrumentalities effective for locking said clampingdevices in effective positions against spring pressure,

said clamping devices remaining effective splacement of aidframe to hold saidord-i eb taut around said platen, whereby ping typewriting machine, the combination of a platen-displacing frame, a platen in said frame around Which may be fed from the rear a multiple-ply, carbon-interleaved,

' formbearing work-web and a- Wider underlying record-sheet having'both side edges exposed,lower feed-rolls, a lever for locking s id platen down against said feed-rolls,

' said lever being effective upon full unlockmg movement to raise said platen slightly off said feed-rolls, and means operatively con nected to said lever and made effective upon initial platen-unlocking movement of the latter for clamping said record-sheet-at bothsides of the platen, said clamping means becoming efiective before said platen is clear of said feed-rolls.

In a typewriting machine, the combiner tion with a carr1age,a platen-displacing frame on said carriage, and a platen around which may be fed from the rear a multipleply, form-bearing, carbon-interleaved workweb and a Wider underlying recordesheet having both side edges exposed, of a lever normally effective forlocking said platen down in typing position and movable to a platen-releasing vposition, wherein it is effec-v tive to raise said platen slightly, and clamping means under control of said lever arranged for clamping said record-sheet at both sides of said platen, movement of said lever to its platen-releasing position causing saidclamping means to grip said record- T. In atypewriting machine, the combination with a carria e. a laten-dis lacin a V a frame on saidcarriage, and a platen around which may be fed from the rear a multipleply, fornrbearing carbon-interleaved workweb and a Wider underlying record-sheet having both side edges exposed, of a lever normally eii'ective for locking said platen down intyping position and movable to a said record-web will be held against falling away from the raised platen onto saidivork web and being kinked or fouled thereby.

3. In a web-manifolding', carbon-striptive to raise said platen slightly, clamping means undercontrol-ofsaid lever arranged for clamping said record-shcet at both sides of said platen, movementof said lover to lts :pl'aten-relea sing position causing, said clampng means to grip said record-sheet, said clamping means including a separate papertable at the introductory side'and at the delivery side of said platen, a separate set of clamps for each table, said clamps bein operatively connected to. said platen-releasing lever, a lateral lOCk-SlitlifbllflVlllQ' both sets of said clamps mounted thereon, and an operative connection between said platen-locking lever and said roclrshaft.

Y 8. 111 a typewriting machine, the combina- V @1011 with a carriage, an upwardly displaceable platen-frame,and aplaten around which may be fed from the rear a multiple-ply, carhon-interleaved Work-web and a wider underlying record-sheet having both side edges exposed, of a locking lever on said frame normally disposed in a forward position for looking said platen down, means effective upon a platen-releasmg, rearward movement of said'lever for raising said platen slight ly, an auxiliary paper-table at the rear of said platen over. which said record-sheet is conducted to the platen, a paper-table at the delivery'side of said platen over which said worlr web and said record-sheet are conducted rearwardly, a pair of clamping arms arranged for gripping said record-sheet against saidfirst named paper-table, a pair of clamping arms arranged for gripping the exposed side edge portions of said recordsheet against said paper-table at the delivery side of said platen, a lateral rock-shaft on which said clamping arms are mounted, and a connection between said shaft and said platen-locking lever including a depending cam-arm fast on said shaft and a laterallyextending pin on said lever arranged for engaging said cam-arm and swinging it counterclockwise, for rotating said shaft and swinging-said clamping arms against their respective tables.

9. The structure described in claim 8, characterized by the platen-raising means including a lateral pin in said platen-displacing frame, anda cam edge on said lever engaging said pin, the rear portion of said cam edge having a dwell whereby initial movement of the lever rearwardly will not move said frame upwardly, the remainder of said cam edge being effective for camming said pin upwardly upon movement of said lever to its rearmost position.

lOaThe structure described in claim 8, characterized by means effective for locking the cam-arm in operated position, whereby the clamping arms operatively connected to said cam-arm are locked against their respective paper-tables.

11; Ina typewriting machine, the combinaidea-ere 'tion with a carriage, an upwardly-displace able platen-frame, and aplaten around which may be fed from the rear a multipleply,

carbon-interleaved work-web and a wider underlying recordssheet, having both slde edges exposed, of alock ng leveronsaid frame normally disposed in a forward positionfor, 5

locking said platen down, means elleetive upon a platen-releasing rearward movement of said lever for raising said platen slightly, an auxiliary paper table at the rear of said platen over whichsaid record-sheet is conducted to the platema paper-table at the delivery side of said plat-en 'overwhich said work-web and said;recordsheet are conducted rearwardly, a pair of clamping arms arranged for gripping saidrecord-sheet against said first-named paper-table, span of clampi ng arms arranged for gripping thee-Xposcd side edge portionsofsaid record-sheet against said paper-table at the "delivery side of said platen, a lateral rock s'haft on which said clamping armsv are mounted, a connection between said shaft and said platen-locking lever including a depending cam-arm fast on said shaft and a laterally-extending pin on said lever arrangedfor engaging said cam-arm and swinging it counterclockwise,

for-rotating said shaft and swinging said clampingarms against their respective tables, the platen-raising means including a lateral pin in said platen-displaeing frame, a camedge on said lever engaging said pin, the'rear portion vof said cam-edge having a dwell whereby vinitial movement of the lever rearwardly will. not move" said frameupwardly, the remainder of said cam-edge be ng effective for eamming said pin upwardly upon movement of said lever to its r-earmost position and means for lockin the cai'n-arin I L. 7 1.4L) 'mounteden said platen-displacing frame,

whereby the clamping" arms remaineifective when the platen is in itsupwardly-displaeed position. -12. dn a typewritingmachine, the comhination with a carriage, an upwardly-displaceable platen-frame, and a platen around which may be fed from the rear a multipleply, carb-on-interleaved work-web anda wider underlying record-sheet having both side edges exposed, of a locking lever on said frame normally disposed in a forward position for locking said platen down, means effective upon a platen-releasing rearward movement of said lever for raising said platen slightly, an auxiliary papei table at the rear of said platen over which said rec-ordsheet is conducted to the platen, a paper 7 table at the delivery side of said platen over which said work-web and said record-sheet are conducted rearwardly, a pair of clamping arms arranged for gripping said recordsheet against said first-named paper-table, a pair of clamping arms arranged for gripping the exposed side edge portions of said record-sheet against said paper-table at the delivery side of said platen, a lateral roel-;-- shaft on which said clamping arms are mounted, a connection between said shaft and said platen-locking lever including a depend mg cam-arm i'ast onsaid shaft and a lateral. J, Lending pin'on said lever arranged for engaging said cam-arm and swinging it counter -cloclrwise' for rotating said shaft and swinging. saidi clamping armsagainst their respective tables, the platendaising means :ineluding a lateral pin in said platei1 clisplac-' ing frame, a cam-edge on said lever engaging said pin, the rear portion of said cam-e ge having a dwell. wiuareby initial movement of j the leve'rrearwa rdly will not" move said frame upwardly, the rem ain der of said ca iii-edgze being eflectiveffor cannningsaid pin upward;- ly upon movement oil saidlev'er toi rearmost position, means eii'ective for locking the cam arm in operated position, whereby the clam ping arms operatively connected to said can-r arm are locked against their respeetive papertables,and a yielding connection between the cam-arm and'the clamping arms, whereby said cam-arm may be swung sufiiciently upon'initial movement of the locking lever to cause said Clamping arms to be effective and thereafter] be swung an additional amount to locking position.

oil said feed-rolls, whereby said work-webmay be pulled ahead, means for clamping said record-sheet at the introductory and delivery sidesof the'platen, including a paper-table at each side oi the platen over which said record-sheet conducted, two sets of normally ineilective (zlmnping arms, one set arranged for engaging against each papertable, instrumentalities made eifective upon initialrearward movement of said loelri n lever for moving said clamps against sprin actioninto engagement ith their respective paper-tables, instrumentaliies effective for" locking said. clamps against their respective tables uponmovement ot said locking lever 'to'itsrearmostposition, said locking instrumentalities remaining etl'ective to grip said record-sheet, while said platen-frame is displaced upwardly for straightening said workweb below said platen preparatory to stripping said carbons, and means effective for automatically releasing said locking instru- 13. In aweb-manifolding, carbon-stripping V spring action.

mentalities upon lowering said plateir'iramc to typing position, whereupon sa d clamparms are swu: g away irom t tne tables to ineffective positions b ctur descrioed in cl characterized by sale, releasing means including a dependingmember carried by said platen-tram and disposed for striking a f rced member of said carriage for operating said easing means. I '1 l5. structure lescribed in claim 13, characterized by said releasing means includa depending member carried by said platen-name and disposed for striking. a

lower feed-rolls,'oft means effective for grip ping the record-web taut on said platen at both sides thereof when said platen is disitscarbon-stripping position, and icntalities effective for automatically said record-web gripping means upon loweringsaid platen, said instrumentalities becoming effective" only after said 7 rec. in ge nent with said feed-rolls, wnereb; said record-web is controlled against ng displaced on platen whilethe latbeing low red to typing position.

ter

17. In a web-manitolding, carbon-stripping typewriting machine of the class de- ,scribed, the combination with an upwardlydisplaceable platen around which a'multipleply work-web interleaved with carbons, and an underlying record-web having both side edges exposed, may be fed from the rear, and lower feed-rolls, of means effective-for gripping the record-web taut on said platen at both sides thereof, said means being normally ineffective and becoming efiective concomitantly with the displacing of said platen upwardly to carbon stripping position, instrumentalities arranged for making said ipping means effective before said platen is disengaged from said feed-rolls, instruinentalities efiective for automatically resaid record web gripping means upon I leasing lowering said platen, said last-named inst'rumentalities becoming effective only after the platen engages said lower feed rolls, whereby said record-web is controlled at all times against slipping out of place on said platen.

18. The structure described in claim, 17, characterized by means for locking said reuord-web clamping means in cli'ective position, upon raising said platen toward a car- 7 hon-stripping position, and devices for auto matically releasing said locking means, upon lower ng said platen-frame toward typing position.

19. In a web-manifolding, carbon-stripping typewriting machine, the combination or" a platen-displacing frame, a plat-en in said frame around which may be fed from the rear a work-web interleaved with carbons and a Wider underlying record-web having both side edges exposed, lowerv feed-rolls, a spring-pressed lever for locking said platen down in typing position, a device at each side of-said platen for clamping said recordweb clear of said work-web, said device'being normally ineiiective, mechanism for making said clamping device effective upon an initial movement of said locking lever, instrumentalities for locking said clamping device in effective position, I said instrumentalities being set by a final releasing movement of.

said locking lever in positions adjacent their eflective locking positions, and means for making the upward displacement of said platen frame in carbonstripping position eliective to move said instrumentalitiesto their effective locking positions, wherein said instrumentalities will hold said clamping device locked in eliectiv-e position irrespective of the displaced position of said platen.

20. The structure described in claim 19, characterized by a device controlled by the lockinglever for raising the platen slightly ofi the feed-rolls upon final releasing movement of said lever, and'means for controlling the clamp-locking instrumentalities so that they are made ineffective by return to normal position of the spring-pressed locking lever prior to the displacement of the platen-frame to web-straightening position.

JESSE A. B. SMITH. 

